***Official Exhaust Thread***
05-23-2011, 11:34 AM
#511
Registered User
Invidia Q300 v4 dual piping measurements:
outer diameter:
midpipde inlet & outlet 69.5 mm
Y inlet 71 mm
Y oulet 60 mm
muffler inlet 60 mm (the piping itself not the expended "end")
inner diameter:
midpipde inlet & outlet 66.5 mm
Y inlet 67mm x 63.6 mm
Y oulet 57 mm
muffler inlet 60.5 mm (this is a size of expended "end")
outer diameter:
midpipde inlet & outlet 69.5 mm
Y inlet 71 mm
Y oulet 60 mm
muffler inlet 60 mm (the piping itself not the expended "end")
inner diameter:
midpipde inlet & outlet 66.5 mm
Y inlet 67mm x 63.6 mm
Y oulet 57 mm
muffler inlet 60.5 mm (this is a size of expended "end")
05-24-2011, 09:28 AM
#512
Registered User
got my Invidia Q300 v4.
the box is huge:
i painted it black with high temp spray can:
installation was easy - ~45 minutes in the workshop.
alignment is pretty good.
tail ends sit OK inside the openings but stick not evently from the rear bumper - but it turns out that the bumper is distorted
after we straightened it out a bit the situation has improved.
all in all by my "anal" standards it's 95% perfect.
we didn't try stock AP2 hangers - we straight went for AP1 style generic hangers.
the box is huge:
i painted it black with high temp spray can:
installation was easy - ~45 minutes in the workshop.
alignment is pretty good.
tail ends sit OK inside the openings but stick not evently from the rear bumper - but it turns out that the bumper is distorted
after we straightened it out a bit the situation has improved.
all in all by my "anal" standards it's 95% perfect.
we didn't try stock AP2 hangers - we straight went for AP1 style generic hangers.
05-24-2011, 10:10 AM
#513
Join Date: Aug 2001
Location: Bay Area, California
Posts: 17,792
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i painted it black with high temp spray can:
installation was easy - ~45 minutes in the workshop.
alignment is pretty good.
tail ends sit OK inside the openings but stick not evently from the rear bumper - but it turns out that the bumper is distorted
after we straightened it out a bit the situation has improved.
all in all by my "anal" standards it's 95% perfect.
we didn't try stock AP2 hangers - we straight went for AP1 style generic hangers.
installation was easy - ~45 minutes in the workshop.
alignment is pretty good.
tail ends sit OK inside the openings but stick not evently from the rear bumper - but it turns out that the bumper is distorted
after we straightened it out a bit the situation has improved.
all in all by my "anal" standards it's 95% perfect.
we didn't try stock AP2 hangers - we straight went for AP1 style generic hangers.
05-24-2011, 10:18 AM
#514
Join Date: Aug 2001
Location: Bay Area, California
Posts: 17,792
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I put a 63mm test pipe on this the other day before our local dyno day @ Blacktrax. It definitely made the exhaust louder then it already was, but took away some of the droning I experience on the freeway.
05-29-2011, 10:24 PM
#518
Originally Posted by stacey' timestamp='1302595125' post='20456261
Would rather bump this thread than make a new one, but what is the lightest dual exhaust available? From what I'm seeing it's the Amuse, but the price isn't all that hot. That's hardtop money. 
$$ indeed
05-30-2011, 10:22 AM
#519
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Join Date: Mar 2005
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question to all, even though most likly the question i'm going to ask has been asnwered somewhere in this long thread:
which single exit exhaust setups actually make a gain in power?
which single exit exhaust setups actually make a gain in power?
05-30-2011, 11:57 AM
#520
Registered User
Thought I'd add this here. Gives an idea of how loud the ASM S-Special 70mm and Fujitsubo Legalis R catbacks are.
All measurements taken with a CEM DT-854 Sound Meter by myself.
Behind Car measurements taken with the meter placed 12" behind passender side tailpipe.
Cabin measurements were taken with meter held above on center console pad, windows up, no radio or AC on.
2007 - Stock car, no modifications. 6,500 miles on car. Taken 5/30/11
67.4 dB Behind car - Idle
83.0 dB Behind car - 4500 rpm Free Rev
80.7 dB Cabin - Shifting 1-3rd gear @ 4500 rpm
95.0 dB Cabin - Shifting 1-3rd gear @ redline (2nd Run - 94.7)
2005 - Stock car w/ Spoon-style snorkel, air box divider removed, OEM filter. 24,000 miles on car. Taken 2/14/11
69.0 dB Behind car - Idle
88.5 dB Behind car - 4500 rpm Free Rev
89.1 dB Cabin - Shifting 1-3rd gear @ 4500 rpm
95.6 dB Cabin - Shifting 1-3rd gear @ redline
2005 - Stock car w/ Spoon-style snorkel, air box divider removed, OEM filter & ASM 70mm S-Special Single SS exhaust. 24,700 miles on car. Taken 5/30/11
82.0 dB Behind car - Idle
93.1 dB Behind car - 4500 rpm Free Rev
92.9 dB Cabin - Shifting 1-3rd gear @ 4500 rpm
98.1 dB Cabin - Shifting 1-3rd gear @ redline (2nd Run - 97.7)
2006 - Stock car w/ Fujitsubo Legalis R catback. 51,000 miles on car. Taken 4/24/11
82.4 dB Behind car - Idle
93.8 dB Behind car - 4500 rpm Free Rev
86.8 dB Cabin - Shifting 1-3rd gear @ 4500 rpm
90.2 dB Cabin - Shifting 1-3rd gear @ redline (2nd Run - 90.8)
All measurements taken with a CEM DT-854 Sound Meter by myself.
Behind Car measurements taken with the meter placed 12" behind passender side tailpipe.
Cabin measurements were taken with meter held above on center console pad, windows up, no radio or AC on.
2007 - Stock car, no modifications. 6,500 miles on car. Taken 5/30/11
67.4 dB Behind car - Idle
83.0 dB Behind car - 4500 rpm Free Rev
80.7 dB Cabin - Shifting 1-3rd gear @ 4500 rpm
95.0 dB Cabin - Shifting 1-3rd gear @ redline (2nd Run - 94.7)
2005 - Stock car w/ Spoon-style snorkel, air box divider removed, OEM filter. 24,000 miles on car. Taken 2/14/11
69.0 dB Behind car - Idle
88.5 dB Behind car - 4500 rpm Free Rev
89.1 dB Cabin - Shifting 1-3rd gear @ 4500 rpm
95.6 dB Cabin - Shifting 1-3rd gear @ redline
2005 - Stock car w/ Spoon-style snorkel, air box divider removed, OEM filter & ASM 70mm S-Special Single SS exhaust. 24,700 miles on car. Taken 5/30/11
82.0 dB Behind car - Idle
93.1 dB Behind car - 4500 rpm Free Rev
92.9 dB Cabin - Shifting 1-3rd gear @ 4500 rpm
98.1 dB Cabin - Shifting 1-3rd gear @ redline (2nd Run - 97.7)
2006 - Stock car w/ Fujitsubo Legalis R catback. 51,000 miles on car. Taken 4/24/11
82.4 dB Behind car - Idle
93.8 dB Behind car - 4500 rpm Free Rev
86.8 dB Cabin - Shifting 1-3rd gear @ 4500 rpm
90.2 dB Cabin - Shifting 1-3rd gear @ redline (2nd Run - 90.8)